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STEP 3
Install the rock bolt into the borehole so that the collar of the aluminum target is 3
inches (75mm) from the collar of the borehole. Using a 13/16” socket (spark plug
wrench can be used) to grip the aluminum target tighten so that the bolt is secure.
Rock Bolt
Aluminum Target
If foam method used Grease
Aluminum target well
Electrical tape to
center
STEP 4
Insert and attach the electronic probe to the borehole collar. Prior to deployment of adhesive the
sensor can be wedged in place. An oversize ring of electrical tape wound on the dGMM(DETECT) works well for all borehole sizes.
1. Using rock bolt resin
Mould the resin around the body of the sensor (this provides the majority of adhesion) and
around the aluminum faceplate.
2. Using expansive foams.
When using expansive foams, first apply a liberal coating of grease to the aluminum target
piece. Then position the sensor in the borehole and spray a small amount of the foam (STEP 41). Complete the application by filling around the collar of the borehole and enclosing the
aluminum face-bar. In wet holes provide a drain hole using the length of tubing provided (STEP
4-2).
d-GMM(DETECT) User Manual Jan 2011
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